Draft-producer and spark-arrester.



PATENTED AUG. 30, 1904.

A. U. TOLIVER. DRAFT PRODUCER AND SPARK ARRESTER.

APPLICATION FILED JULY 22, 1903.

N0 MODEL.

UNITED STATES Patented August 30, 1904.

ATET Frieze.

ALBERT O. TOLIVER, OF GLENROUK, IVYOMING, ASSIGN OR OF ON E-HALF TO J. F. PATTERSON, OF GLENROOK, WYOMING.

DRAFT-PRODUCER AND SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 768,782, dated August 30, 1904;.

Application filed July 22, 1903.

To all whom, it may concern.-

Be it known that I. ALBERT C. ToLIvER, a

- citizen of the United States, residing at Glen rock, in the county of Converse and State of 5 Wyoming, have invented a certain new and useful Draft-Producer and Spark-Arrester, of

which the following is a specification.

The invention relates to a draft-producer and spark-arrester; and it has for its object IO to provide a simple and comparatively inexpensive device adapted to be readily applied to locomotives and capable of producing a steady draft through the smoke-stack and of simultaneously arresting and extinguishing the sparks.

l/Vith these and other objects in view the invention consists in the construction and arrangement of parts hereinafter described and claimed, and illustrated in. the accompanying 2O drawings.

In the drawings forming part of this specification, and in which like letters of refer ence designate corresponding parts, Figure l is a vertical sectional view of a combined draftproducer and spark-arrester constructed in accordance with this invention and shown ap plied to a locomotive-boiler. Fig. 2 is a horizontal sectional View. Fig. 3 is a detailperspective view of the rotary fan.

Referring to the drawings, F designates an exhaust-steam pipe arranged vertically in and extending upward from the bottom of the smoke-box X of a locomotive-boiler and provided near its upper end with an interiorlyarranged spider E, forming a support for an annular series of antifriction-balls D,on which is arranged an annular shoulder or bearing of a vertical shaft A. The vertical shaft A, which consists of a tube, is supported at its 4 lower portion by antifriction-balls D, and it is provided at its upper end with a ball-cup, receiving an annular series of antifrictionballs D, which bear against a top spider E, the upper balls D being interposed between the cup and the central portion of the spider, which is provided with an opening for the upper end of the hollow shaft. The upper spider is secured within the top of the stack,

. otherwise injuring the smoke-stack.

Serial No. 166,640. (No model.

as shown. The hollow shaft is provided opposite the antifriction-balls with perforations, 5 and the said balls are lubricated by the oil carried upward by the exhaust-steam.

" hIounted upon the shaft is arotary fan consisting of a cylindrical casing having a cap 0 at its lower end to fit over the upper end ofg the exhaust-pipe F. The fan is provided with a series of spirally-arranged hollow blades Gr, communicating at their lower ends with the cap and forming spiral passages for the exhaust-steam, whereby the fan will be rotated when the steam passes upward through such spiral passages. The spiral blades, which extend upward around the fan from the cap O to the top of the tubular casing, are adapted when the fan rotates to create a draft in the 5 smoke-stack I. This steady draft not only in sures the proper burning of the fuel, but prevents sudden and jerky pufl's which often dislodge the coal from the grate and result in choking the boiler-tubes. The spiral blades 7 'may be of any desired size and number to adapt the device to the character of the fuel employed.

\Vithin the smoke-stackIis arranged a cylindrical jacket H, which surrounds the fan and which prevents theheat from warping or The upper portion of the jacket is provided with perforations K, and the sparks are thrown outward by centrifugal force and are forced through the perforations of the jacket, thereby extinguishing the sparks and causing the cinders to collect or to be thrown into the diamond-shaped smoke-stack. This prevents the damage which often results from the live 5 sparks emitted by a locomotive.

, That I claim is- 1. In a device of the class described, the combination with a smoke-stack of a jacket arranged therein and having apertures and a 9 rotary fan operating in the jacket and adaptcd to throw the sparks against the same, substantially as described.

2. In a device of the class described, the combination with a smoke-stack, of a rotary fan provided with interiorly-arranged spiral blades communicating with the exhaust-pipe, 5 substantially as described.

5. In a device of the class described, the combination with a stack, and an exhaust-pipe, of upper and lower spiders, a hollow shaft journaled in the spiders ball-bearin gs arranged 2 O at the said spiders, and a rotary t'an mounted on the shaft and provided with hollow spiral blades communicating with the exhaust-pipe.

ALBERT C. TOLIVER.

Witnesses:

J. F. PATTERSON, (J. F. PATTERSON. 

